DE102018108443A1 - Internal combustion engine and modular system for an internal combustion engine - Google Patents

Abstract

Internal combustion engine (10), with a cylinder crankcase (11) in which a crankshaft (12) is mounted; at least one cylinder bank (14) having a plurality of cylinders (13), each cylinder (13) having a cylinder head with at least one charge air intake valve and at least one exhaust gas exhaust valve; with a valvetrain for actuating the or each intake valve for charge air of the respective cylinder (13) and for actuating the or each exhaust valve for the respective cylinder (13); a fuel supply system (15) for supplying the cylinders (13) with fuel; wherein the fuel supply system (15) of the internal combustion engine (10) is designed in a modular manner such that at least one pump module (16) is attached to the cylinder crankcase (11) per cylinder bank (14), the respective pump module (16) comprising a housing (17). , a plurality of plug-in pumps (18) accommodated by the housing (17) and a camshaft (19) each comprising at least one cam per actuatable plug-in pump (18), and the respective pump module (16), namely the camshaft (19) of the same, starting from the crankshaft (12) via a gear drive (21) and a drive shaft (22) is drivable.

Description

The invention relates to an internal combustion engine. Furthermore, the invention relates to a modular system for an internal combustion engine.

The present invention relates in particular to the field of so-called large engines or large combustion engines whose cylinders have piston diameters of more than 140 mm, in particular more than 175 mm. Such large internal combustion engines are, for example, marine diesel engines or gas engines.

Until now, large combustion engines have always been individually designed for a defined purpose of use and defined requirements have been designed internal combustion engines. If a large internal combustion engine to be redeveloped, as a rule, all components of the same are subjected to a new development.

So far, in a new development of a large internal combustion engine is not accessed on existing components of existing large combustion engines in order to continue to use as much as possible proven components unchanged. This is a disadvantage.

On this basis, the invention is based on the object to provide a novel internal combustion engine.

This object is achieved by an internal combustion engine according to claim 1.

The internal combustion engine according to the invention has a cylinder crankcase, in which a crankshaft is mounted.

The internal combustion engine according to the invention has at least one cylinder bank having a plurality of cylinders, wherein each cylinder has a cylinder head with at least one inlet valve for charge air and with at least one outlet valve for exhaust gas.

The internal combustion engine according to the invention comprises a valve train for actuating the or each intake valve for charge air of the respective cylinder and for actuating the or each exhaust valve for exhaust gas of the respective cylinder.

The internal combustion engine according to the invention comprises a fuel supply system for supplying the cylinders with fuel, wherein the fuel supply system of the internal combustion engine is designed in modular construction, such that each cylinder bank at least one pump module is attached to the cylinder crankcase, wherein the respective pump module comprises a housing, a plurality of plug-in pumps and a camshaft each comprising at least one cam per actuatable plug pump, and wherein the respective pump module, namely the camshaft thereof, starting from the crankshaft via a gear drive and a drive shaft is drivable.

Such an internal combustion engine, in which pump modules of the modular fuel supply system in a housing of the pump module accommodate a plurality of plug-in pumps, uses pump modules that are designed for different types or versions of an internal combustion engine as equal parts. The use of such common parts simplifies the development of new internal combustion engines, since already available and tested components can be accessed. In most different embodiments of an internal combustion engine, the pump modules can be used as equal parts, without a new development of the same is required.

According to a first variant of the invention, the fuel supply system is a common rail fuel supply system, wherein each cylinder bank a single pump module is attached to the cylinder crankcase, wherein the plug pumps of the pump module are designed as common rail plug-in pumps, and wherein the camshaft of the pump module depending operable common Rail plug-in pump each comprises a plurality of cams. In this way, an internal combustion engine with a common rail fuel supply system can be easily set up, namely by accessing corresponding pump modules with common rail plug-in pumps.

According to a second variant of the invention, the fuel supply system is a single pump fuel supply system in which the number of plug-in dolls per cylinder bank corresponds to the number of cylinders per cylinder bank, wherein each cylinder bank a plurality of pump modules are attached to the cylinder crankcase, wherein the plug-in pumps of the respective pump module are designed as Einzelsteckpumpen, and wherein the camshaft of the pump module per actuated single-stroke pump each comprises a single cam. The plurality of pump modules per cylinder bank are connected in series on the drive side, such that the camshaft of a first pump module is drivable from the crankshaft via the gear drive and the drive shaft, and that the camshaft of each further pump module with the interposition of the first pump module from the crankshaft via the Wheel drive and the drive shaft is driven. In this way, an internal combustion engine having a single pump fuel supply system can be easily constructed, namely with access to corresponding pump modules, which are designed as equal parts and use single-outlet pumps.

An inventive modular system for a valve train of an internal combustion engine is defined in claim 9.

With the modular system according to the invention can be accessed regardless of the number of cylinders of the internal combustion engine and regardless of the fuel type of the internal combustion engine on the same parts. Then, when the internal combustion engine burns diesel fuel, a corresponding fuel supply system is constructed with the pump modules. If, by contrast, a gas engine is to be formed, a corresponding gas engine can be constructed simply by omitting the pump modules. A wide variety of internal combustion engines can be designed application-specific with storage engines in the last assembly steps. The fuel supply system with the pump modules has no influence on the basic engine architecture, ie on the cylinder crankcase, cylinder heads and valve trains. With the modular system both diesel engine and gas engine can be constructed without assemblies of gas engine are oversized, especially gear drives, bearings, shafts and housing.

• 1 eine schematisierte Seitenansicht einer Zylinderbank ersten erfindungsgemäßen Brennkraftmaschine mit Common-Rail Kraftstoffversorgungssystem;
• 2 eine schematisierte Seitenansicht einer Zylinderbank zweiten erfindungsgemäßen Brennkraftmaschine mit Common-Rail Kraftstoffversorgungssystem;
• 3 eine schematisierte Seitenansicht einer Zylinderbank dritten erfindungsgemäßen Brennkraftmaschine mit Common-Rail Kraftstoffversorgungssystem;
• 4 eine schematisierte Seitenansicht einer Zylinderbank vierten erfindungsgemäßen Brennkraftmaschine mit Common-Rail Kraftstoffversorgungssystem;
• 5 eine schematisierte Seitenansicht einer Zylinderbank fünften erfindungsgemäßen Brennkraftmaschine mit Common-Rail Kraftstoffversorgungssystem;
• 6 eine schematisierte Seitenansicht einer Zylinderbank sechsten erfindungsgemäßen Brennkraftmaschine mit Einzelpumpen Kraftstoffversorgungssystem;
• 7 eine schematisierte Seitenansicht einer Zylinderbank siebten erfindungsgemäßen Brennkraftmaschine mit Einzelpumpen Kraftstoffversorgungssystem;
• 8 eine schematisierte Seitenansicht einer Zylinderbank achten erfindungsgemäßen Brennkraftmaschine mit Einzelpumpen Kraftstoffversorgungssystem;
• 9 eine schematisierte Seitenansicht einer Zylinderbank neunten erfindungsgemäßen Brennkraftmaschine mit Einzelpumpen Kraftstoffversorgungssystem;
• 10 eine schematisierte Seitenansicht einer Zylinderbank zehnten erfindungsgemäßen Brennkraftmaschine mit Einzelpumpen Kraftstoffversorgungssystem;
• 11 ein erstes Detail der erfindungsgemäßen Brennkraftmaschinen;
• 12 ein zweites Detail der erfindungsgemäßen Brennkraftmaschinen.

Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:

• 1 a schematic side view of a cylinder bank first internal combustion engine according to the invention with common rail fuel supply system;
• 2 a schematic side view of a cylinder bank second internal combustion engine according to the invention with common rail fuel supply system;
• 3 a schematic side view of a cylinder bank third internal combustion engine according to the invention with common rail fuel supply system;
• 4 a schematic side view of a cylinder bank fourth internal combustion engine according to the invention with common rail fuel supply system;
• 5 a schematic side view of a cylinder bank fifth internal combustion engine according to the invention with common rail fuel supply system;
• 6 a schematic side view of a cylinder bank sixth internal combustion engine according to the invention with single pump fuel supply system;
• 7 a schematic side view of a cylinder bank seventh internal combustion engine according to the invention with single pump fuel supply system;
• 8th a schematic side view of a cylinder bank eighth engine according to the invention with single pump fuel supply system;
• 9 a schematic side view of a cylinder bank ninth internal combustion engine according to the invention with single pump fuel supply system;
• 10 a schematic side view of a cylinder bank tenth internal combustion engine according to the invention with single pump fuel supply system;
• 11 a first detail of the internal combustion engine according to the invention;
• 12 a second detail of the internal combustion engine according to the invention.

The present invention relates to an internal combustion engine in modular form, in which regardless of the specific embodiment of the internal combustion engine, a plurality of components in the sense of a modular system can be used unchanged or with minimal adjustments. Furthermore, the invention relates to a modular system for such an internal combustion engine.

1 to 5 show different internal combustion engines with a common rail fuel supply system. Each of the in 1 to 5 shown internal combustion engines 10 has a cylinder crankcase 11 in which a crankshaft 12 is stored. From the crankshaft 12 is shown only schematically a longitudinal central axis. The crankshaft 12 extends between a so-called coupling side 11a and a so-called coupling opposite side 11b of the cylinder crankcase 11 ,

The internal combustion engines 10 each have several cylinders 13 , wherein in each case a plurality of cylinders arranged in a row 13 a cylinder bank 14 form. From the cylinders 13 are shown schematically only axes of cylinder bores, which piston of the respective cylinder 13 take up.

With every cylinder 13 acts a not shown cylinder head together, the at least one intake valve for charge air and at least one exhaust valve for exhaust gas. Then, when the internal combustion engine is designed as a diesel internal combustion engine or as a dual-fuel engine, the respective cylinder head also provides an injector for fuel or ignition oil in addition to the intake valve for charge air and exhaust gas exhaust valve.

The internal combustion engines 1 to 5 differ by the number of their cylinders 13 the respective cylinder bank 14 , In 1 includes the cylinder bank shown 14 six cylinders 13 , In 2 includes the cylinder bank 14 seven cylinders 13 , In 3 . 4 and 5 are cylinder banks 14 of internal combustion engines 10 with eight, nine or ten cylinders 13 shown.

Each of the in 1 to 5 shown internal combustion engines 10 moreover, has a valve drive, not shown, for actuating the or each intake valve for charge air of the respective cylinder 13 and for actuating the or each exhaust valve of the respective cylinder 13 , The execution of such valve trains is familiar to the person skilled in the art.

As already stated, the internal combustion engines 10 of the 1 to 5 designed as common rail internal combustion engines, which designed as a common rail fuel supply system fuel supply system 15 exhibit.

The fuel supply system 15 an internal combustion engine according to the invention 10 is designed according to the invention in modular design, in such a way that per cylinder bank 14 in each case at least one pump module 16 of the fuel supply system 15 on the cylinder crankcase 11 is attached, wherein the respective pump module 16 a housing 17 , several of the case 17 recorded plug-in pumps 18 and a camshaft 19 (please refer 11 ) having. The camshaft 19 indicates the respective operated plug-in pump 18 in each case at least one cam 20 on, with the camshaft 19 of the respective pump module 16 starting from the crankshaft 12 is drivable, namely on a gear drive 21 (please refer 12 ) and a drive shaft 22 (please refer 1 to 10 ).

In the in the 1 to 5 shown internal combustion engines with the common rail fuel supply system promote the common rail plug-in pumps 18 of the respective pump module 16 Fuel in a pressure accumulator, starting from the pressure accumulator the fuel injectors of the respective cylinder 13 to be fed.

In the common-rail internal combustion engines of 1 to 5 is per cylinder bank 14 one pump module each 16 on the cylinder crankcase 11 attached, which, as already stated, the plug-in pumps 18 of the pump module 16 designed as common rail plug-in pumps. The camshaft 19 of the respective pump module 16 then includes each operable plug pump 18 several cams 20 , preferably depending to be actuated common rail plug-in pump 18 three cams 20 ,

Then, if like in 1 and 2 shown the cylinder bank 14 six cylinders (see 1 ) or seven cylinders (see 2 ), takes the respective pump module 16 the cylinder bank 14 three common-rail plug-in pumps 18 on. Then, on the other hand, if the cylinder bank has eight cylinders (see 3 ), nine cylinders (see 4 ) or ten cylinders (see 5 ), the pump module takes 16 the respective cylinder bank 14 four common rail plug-in pumps 18 on.

As already stated above, the drive of the respective pump module takes place 16 starting from the crankshaft 12 , 12 shows for a combustion engine in V-construction with two cylinder banks a gear train 21 , by means of which starting from the crankshaft 12 the drive of the respective pump module 16 the respective cylinder bank 14 can be done. The crankshaft 12 carries a crankshaft wheel 23 into which a first step 24a a stage wheel 24 combs. A second stage 24b the stage wheel 24 meshes with a drive wheel 25 that with the respective drive shaft 22 connected is. The speed of the drive shaft is 22 in one through the step wheel 24 certain speed ratio to the speed of the crankshaft 12 , The drive shaft 22 is via a flange connection 26 with the camshaft 19 of the respective pump module 16 coupled.

6 to 10 show embodiments of inventive internal combustion engine, the fuel supply system 15 not designed as a common-rail fuel supply system, but as a single-pump fuel supply system. In such a single pump fuel supply system corresponds to the number of individual pumps 18 the fuel supply system of the number of cylinders 13 , In the internal combustion engines 10 of the 6 to 10 is provided that per cylinder bank 14 several pump modules 16 are present, each pump module 16 again a housing 17 which has a plurality of plug-in pumps designed as single-plug pumps 18 receives. Furthermore, each pump module has 16 over a camshaft 19 where the camshaft 19 of the respective pump module 16 each to be operated single plug pump 18 each a single cam 20 having.

Then, if like in 6 shown the cylinder bank 14 six cylinders 13 includes are on the cylinder crankcase 11 two pump modules 16 With three individual plug pumps each 18 assembled. Then, if so 7 shows the cylinder bank 14 seven cylinders 13 in turn, are two pump modules 13 on the cylinder crankcase 11 for the respective cylinder bank 14 mounted, namely a pump module 16 with four single-outlet pumps 18 and a pump module 16 with three single plug pumps 18 , In the variant of 8th in which the cylinder bank 14 eight cylinders 13 includes are also two pump modules 16 on the cylinder crankcase 11 for the respective cylinder bank 14 mounted, each with four Einzelsteckpumpen 18 , In the variants of 9 and 10 with nine or ten cylinders 13 , are for the respective cylinder bank 14 on the cylinder crankcase 11 three pump modules each 16 mounted, namely in 9 at nine cylinders 13 three pump modules 16 each with three individual plug pumps 18 and in the variant of 10 with ten cylinders, two pump modules 16 each with three individual plug pumps 18 and a pump module 16 with four single-outlet pumps 18 ,

Then, if as in the embodiments of the 6 to 10 Providing a single pump fuel supply system several pump modules 16 on the cylinder crankcase 11 for the respective cylinder bank 14 are mounted, are the pump modules 16 connected in series on the drive side. A first of the pump modules 16 , and that, which is the smallest distance to the coupling side 11a and thus to the wheel drive 21 is over the wheel drive 21 and the drive shaft 22 drivable in the manner described above. The camshaft 19 another, further from the coupling side 11a spaced pump module 16 is with the interposition of the already mentioned first pump module 16 also starting from the crankshaft 12 over the wheel drive 21 and drive shaft 22 driven, in which case the drive shaft 22 not only between the camshaft 19 of the first pump module 16 and the wheel drive 21 but also between the camshafts 19 adjacent pump modules 16 extends.

The invention further relates to a modular system by means of which internal combustion engines can be constructed without the need for the redesign of components of the internal combustion engine, with the provision of so-called supply engines, which are executed application-specific only in the last assembly steps.

Thus, the modular system includes several cylinder crankcases, depending on the specific design of the internal combustion engine in V-type or R-type cylinder crankcase with a cylinder bank 14 or two cylinder banks 14 and a defined number of cylinders 13 per cylinder bank 14 , with six or seven or eight or nine or ten cylinders 13 per cylinder bank 14 ,

Furthermore, the modular system comprises cylinder heads for the internal combustion engines, wherein each cylinder head for the respective cylinder has at least one charge valve for charge air and at least one exhaust valve for exhaust gas. Optionally, the cylinder heads may also include fuel injectors.

The modular system also has valve trains for internal combustion engines. The respective valve trains are used to actuate the at least one intake valve for charge air of the respective cylinder and the actuation of the at least one exhaust valve of the respective cylinder.

The modular system also has the pump modules described above 16 acting as pump modules 16 with common-rail plug-in pumps or as pump modules 16 can be executed with single plug pumps. Depending on whether an internal combustion engine is to be constructed with a common rail fuel supply system or a single pump fuel supply system, corresponding pump modules 16 selected and on the cylinder crankcase 11 for the respective cylinder bank 14 the internal combustion engine 10 installed.

The selection of the or each pump module 16 also depends on the number of cylinders 13 per cylinder bank 14 from.

Furthermore, the modular system comprises the above-described wheel drive 21 as well as the drive shafts 22 to the pump modules 16 the fuel supply systems 15 starting from the crankshaft 12 drive.

In the internal combustion engines 10 of the 6 to 10 with a single pump fuel supply system can be in the range of flange connection 26 between the camshaft 19 of the first pump module 16 and the drive shaft 22 a phaser are used to inject fuel into the cylinders 13 to change. This has no influence on the timing of the gas exchange valves. In internal combustion engines 10 of the 1 to 5 With a common-rail fuel supply system, the change of the injection timing of the fuel into the cylinder via the control of fuel injectors.

With the invention can be accessed regardless of the number of cylinders of the internal combustion engine and regardless of the fuel type of the internal combustion engine to the same parts. Then, when the internal combustion engine burns diesel fuel, a fuel supply system is constructed with the pump modules. If a gas engine is to be formed, a gas engine can be constructed by omitting the pump modules. Most different internal combustion engines can be designed application-specific with storage engines in the last assembly steps. The fuel supply system with the pump modules has no influence on the basic engine architecture, ie on the cylinder crankcase, cylinder heads and valve trains. Both diesel internal combustion engines and gas internal combustion engines can be constructed without assemblies being oversized. The drive shafts and camshafts for the pump modules 16 are only available if actually needed. Interfaces of the pump modules 16 to adjacent assemblies are uniform.

LIST OF REFERENCE NUMBERS

10

Internal combustion engine

11

cylinder crankcase

11a

coupling side

11b

Clutch opposite side

12

crankshaft

13

cylinder

14

cylinder bank

15

Fuel Supply System

16

pump module

17

casing

18

plug-in pump

19

camshaft

20

cam

21

gear drive

22

drive shaft

23

crankshaft gear

24

step gear

24a

first stage

24b

second step

25

drive wheel

26

flange

Claims (10)

Internal combustion engine (10), with a cylinder crankcase (11) in which a crankshaft (12) is mounted; at least one cylinder bank (14) having a plurality of cylinders (13), each cylinder (13) having a cylinder head with at least one charge air intake valve and at least one exhaust gas exhaust valve; with a valvetrain for actuating the or each intake valve for charge air of the respective cylinder (13) and for actuating the or each exhaust valve for the respective cylinder (13); a fuel supply system (15) for supplying the cylinders 13) with fuel; wherein the fuel supply system (15) of the internal combustion engine (10) is designed in a modular manner such that at least one pump module (16) is attached to the cylinder crankcase (11) per cylinder bank (14), the respective pump module (16) comprising a housing (17). , a plurality of plug-in pumps (18) accommodated by the housing (17) and a camshaft (19) each comprising at least one cam (20) for each plug-in pump (18) to be actuated, and wherein the respective pump module (16), namely the camshaft (19) thereof, starting from the crankshaft (12) via a gear drive (21) and a drive shaft (22) is drivable. Internal combustion engine after Claim 1 , characterized in that the fuel supply system (15) is a common rail fuel supply system, that per cylinder bank (14) a single pump module (16) on the cylinder crankcase (11) is fixed, the plug-in pumps (18) of the pump module (16) as common Rails plug-in pumps are formed, and that the camshaft (19) of the pump module (16) per each actuable plug-in pump (18) each comprise a plurality of cams (20). Internal combustion engine after Claim 2 , characterized in that the cylinder bank (14) comprises six or seven cylinders (13), and that the pump module (16) of the cylinder bank (14) receives three common-rail plug-in pumps (18). Internal combustion engine after Claim 2 , characterized in that the cylinder bank (14) comprises eight, nine or ten or more cylinders (13), and that the pump module (16) of the cylinder bank (14) receives four common rail plug pumps (18). Internal combustion engine after Claim 1 , characterized in that the fuel supply system (15) is a single pump fuel supply system, wherein the number of plug-in pumps (18) per cylinder bank (14) the number of cylinders (13) per cylinder bank (14) corresponds to that per cylinder bank (14) more Pump modules (16) are attached to the cylinder crankcase (11), that the plug-in pumps (18) of the respective pump module (16) are designed as Einzelsteckpumpen, and that the camshaft (19) of the pump module (16) each operable single plug pump (18) each one single cam (20). Internal combustion engine after Claim 5 , characterized in that the cylinder bank (14) comprises six or seven or eight cylinders (13), that two pump modules (16) per cylinder bank (14) are mounted on the cylinder crankcase (11), namely in a cylinder bank with six cylinders two pump modules ( 16), each with three Einzelsteckpumpen, in a cylinder bank with eight cylinders two pump modules (16) each with four Einzelsteckpumpen or a cylinder bank with seven cylinders a pump module (16) with three and a pump module (16) with four Einzelsteckpumpen. Internal combustion engine after Claim 5 , characterized in that the cylinder bank (14) comprises nine or ten cylinders (13), that three pump modules (16) per cylinder bank (14) are mounted on the cylinder crankcase (11), namely with cylinder bank with nine cylinders three pump modules (16) three single-stroke pumps or, in the case of a cylinder bank with ten cylinders, two pump modules (16) each with three pumps and one pump module (16) with four single-outlet pumps. Internal combustion engine according to one of Claims 5 to 7 , characterized in that the plurality of pump modules (16) per cylinder bank (14) are connected in series on the drive side, such that the camshaft (19) of a first pump module starting from the crankshaft (12) via the gear drive (21) and the drive shaft ( 22) is drivable, and that the camshaft (19) of each further pump module (6) with the interposition of the first pump module (16) starting from the crankshaft (12) via the gear drive (21) and the drive shaft (22) is drivable. Modular system for internal combustion engines (10), cylinder crankcase (11) for internal combustion engines (10), wherein the respective cylinder crankcase has at least one cylinder bank (14) with six of the seven or eight or nine or ten cylinders (13), wherein in the respective cylinder crankcase a crankshaft (12) is guided; with cylinder heads for internal combustion engines (10), wherein the respective cylinder head for the respective cylinder (13) has at least one charge air intake valve and at least one exhaust gas exhaust valve; with valve trains for internal combustion engines (10), wherein the respective valve train of the operation of the at least one intake valve for charge air of the respective cylinder (13) and for actuating the at least one exhaust valve of the respective cylinder (13); with pump modules (16) for a fuel supply system (15) for supplying the cylinder (13) of the respective internal combustion engine (10) with fuel; wherein each pump module (16) has a housing (17), a plurality of plug-in pumps (18) received by the housing (17) and a camshaft (12) each comprising at least one cam (20) for each plug-in pump (18) to be actuated, and wherein the respective pump module (16), namely the camshaft (12) of the same, starting from the crankshaft (12) via a gear drive (21) and a drive shaft (22) is drivable. Modular system according to Claim 9 characterized by features according to one or more of Claims 2 to 8th ,

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